Hello, I have noticed two weeks ago that some red spots have appeared on the glans and corona parts of my penis. When I first noticed them, they were not itchy or anything. Now, some have went away and one has formed on the tip of the glans and is bigger than all the other spots and they are now a bit itchy from time to time. Also, I have recently noticed that I have some spots on my scrotum. They are itchy and I try to shower and clean that area so it doesn't itch but it only works for a little while. And I have also noticed some blister-like spots on my hands. When I poke them, they kinda sting. I popped one but its just red under it. No fluid. I am somewhat sexually active but I masturbate more than have sexual contact because of my fears of catching STD's. I haven't had sex in almost a month. Could the masturbating cause this? Is this Herpes? Psoriasis? Some type of cancer? I have done lots of research and came to the conclusion I MIGHT have caught an STD. Please, I need some professional assistance. Thank you.